Preformed Line Products GLS-2106 Strand Splice. Extra High Strength C-Coat. For use on: Extra High Strength, High Strength, Siemens Martin, Utilities Grade2. Strand size 5/16", Strand construction 3W / 7W, Strand actual diameter .312" /.327", Length 42", No. of subsets 3, Rod diameter .086", Color code Black.